diff --git a/docs/theme/style.css b/docs/theme/style.css
new file mode 100644
index 0000000..d4023a0
--- /dev/null
+++ b/docs/theme/style.css
@@ -0,0 +1,14 @@
+/** Code blocks */
+code {
+    padding: 0.2em 0.4em !important;
+    border-radius: 6px !important;
+}
+/** Not inlined code blocks */
+pre > code {
+    padding: 0.8em 1.2em !important;
+}
+
+/** Make dark theme background darker */
+[data-md-color-scheme="slate"] {
+    --md-default-bg-color: #0d1117;
+}
diff --git a/mkdocs.yml b/mkdocs.yml
index 4d0e3c2..f65485f 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -27,6 +27,7 @@ theme:
       toggle:
         icon: material/weather-night
         name: Switch to light mode
+      primary: custom
   language: en
   favicon: terminal.png
   font:
@@ -38,6 +39,8 @@ theme:
     - navigation.instant
     - search.suggest
     - search.highlight
+extra_css:
+  - theme/style.css
 
 markdown_extensions:
   - toc: